Without delay, let's solve this. We've got 497 and we will be multiplying it by 86, that is, adding 497 to itself 86 times.
Step 1: 0 + 497 = 497
Step 2: 497 + 497 = 994
Step 3: 994 + 497 = 1491
Step 4: 1491 + 497 = 1988
Step 5: 1988 + 497 = 2485
Step 6: 2485 + 497 = 2982
Step 7: 2982 + 497 = 3479
Step 8: 3479 + 497 = 3976
Step 9: 3976 + 497 = 4473
Step 10: 4473 + 497 = 4970
Step 11: 4970 + 497 = 5467
Step 12: 5467 + 497 = 5964
Step 13: 5964 + 497 = 6461
Step 14: 6461 + 497 = 6958
Step 15: 6958 + 497 = 7455
Step 16: 7455 + 497 = 7952
Step 17: 7952 + 497 = 8449
Step 18: 8449 + 497 = 8946
Step 19: 8946 + 497 = 9443
Step 20: 9443 + 497 = 9940
Step 21: 9940 + 497 = 10437
Step 22: 10437 + 497 = 10934
Step 23: 10934 + 497 = 11431
Step 24: 11431 + 497 = 11928
Step 25: 11928 + 497 = 12425
Step 26: 12425 + 497 = 12922
Step 27: 12922 + 497 = 13419
Step 28: 13419 + 497 = 13916
Step 29: 13916 + 497 = 14413
Step 30: 14413 + 497 = 14910
Step 31: 14910 + 497 = 15407
Step 32: 15407 + 497 = 15904
Step 33: 15904 + 497 = 16401
Step 34: 16401 + 497 = 16898
Step 35: 16898 + 497 = 17395
Step 36: 17395 + 497 = 17892
Step 37: 17892 + 497 = 18389
Step 38: 18389 + 497 = 18886
Step 39: 18886 + 497 = 19383
Step 40: 19383 + 497 = 19880
Step 41: 19880 + 497 = 20377
Step 42: 20377 + 497 = 20874
Step 43: 20874 + 497 = 21371
Step 44: 21371 + 497 = 21868
Step 45: 21868 + 497 = 22365
Step 46: 22365 + 497 = 22862
Step 47: 22862 + 497 = 23359
Step 48: 23359 + 497 = 23856
Step 49: 23856 + 497 = 24353
Step 50: 24353 + 497 = 24850
Step 51: 24850 + 497 = 25347
Step 52: 25347 + 497 = 25844
Step 53: 25844 + 497 = 26341
Step 54: 26341 + 497 = 26838
Step 55: 26838 + 497 = 27335
Step 56: 27335 + 497 = 27832
Step 57: 27832 + 497 = 28329
Step 58: 28329 + 497 = 28826
Step 59: 28826 + 497 = 29323
Step 60: 29323 + 497 = 29820
Step 61: 29820 + 497 = 30317
Step 62: 30317 + 497 = 30814
Step 63: 30814 + 497 = 31311
Step 64: 31311 + 497 = 31808
Step 65: 31808 + 497 = 32305
Step 66: 32305 + 497 = 32802
Step 67: 32802 + 497 = 33299
Step 68: 33299 + 497 = 33796
Step 69: 33796 + 497 = 34293
Step 70: 34293 + 497 = 34790
Step 71: 34790 + 497 = 35287
Step 72: 35287 + 497 = 35784
Step 73: 35784 + 497 = 36281
Step 74: 36281 + 497 = 36778
Step 75: 36778 + 497 = 37275
Step 76: 37275 + 497 = 37772
Step 77: 37772 + 497 = 38269
Step 78: 38269 + 497 = 38766
Step 79: 38766 + 497 = 39263
Step 80: 39263 + 497 = 39760
Step 81: 39760 + 497 = 40257
Step 82: 40257 + 497 = 40754
Step 83: 40754 + 497 = 41251
Step 84: 41251 + 497 = 41748
Step 85: 41748 + 497 = 42245
Step 86: 42245 + 497 = 42742

So, 497*86 = 42742